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Epistasis is observed when the allele of one gene masks the effects of another gene. Use the Punnett square to answer the question. AB Ab aB ab AB AABB black AABb black AaBB black AaBb black Ab AABb black AAbb brown AaBb black Aabb brown aB AaBB black AaBb black aaBB yellow aaBb yellow ab AaBb black Aabb brown aaBb yellow aabb ? What color would a dog's fur be if its genes are aabb? (1 point) Responses yellow yellow white white brown brown black

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To determine the color of a dog's fur with the genotype aabb, we need to analyze the information provided about the alleles and their effects.

From the Punnett square provided, we can deduce the following:

  • The capital letters (A and B) represent dominant alleles, while the lowercase letters (a and b) represent recessive alleles.
  • The combination of alleles will influence the coat color.

In the provided example:

  • AABB, AABb, and AaBB produce black fur.
  • AAbb produces brown fur.
  • Aabb produces brown fur.
  • aaBB and aaBb both produce yellow fur.
  • aabb is the combination of both a and b being homozygous recessive.

Since aabb has both recessive alleles (aa for Gene A and bb for Gene B), and because in the Punnett square, aabb is not associated with any dominant alleles (which would produce black or brown), it leads us to conclude that:

  • aabb leads to yellow fur.

Thus, the color of the dog's fur with the genotype aabb would be yellow.